That is the difference of specialised software in comparison to duct-taped solution like Teams. The first one has code to decide what is meaningful for the user

That is the difference of specialised software in comparison to duct-taped solution like Teams. The first one has code to decide what is meaningful for the user in a given context, the second "just renders" the whole thing and show the user a thumbnail, probably without even knowing what kind of content it is dealing with.